body{
    margin: 0;
}
ul{
    width: 90%;
    padding: 0;
    margin:0 auto 0 auto;
    background-color: #ccc;
}
header{
    width: 100%;
    height: 45px;
    background-color: #b52221;
    text-align: center;
    color: #fff;
    line-height: 40px;      
}
ul li{
    list-style-type: none;
    float: left;
    width: 33.3%;
    font-size: 0;
    text-align: center;
}
ul li img{
    margin: 8px;
    border:2px solid #000;
}
footer{
    margin-top: 10px;
    text-align: center;
    font-size: 13px; 
}